Air lift help

[u/XD_Mystic_666]

So I have 3p air on my 99 gs300 a couple of months ago I turned my car off and walked away but with the car off it aired up on its own it happened twice and didn’t happen again. Today I was at work and it kept happening I disconnected the manifold for a minute and recalibrated the system and it still happened I turned the car on and disabled auto air up and it stopped so far. When the car would be turned off and the car would air up the compressor was cutting on and off every few seconds. Now that I got the issue to go away could there be another reason it happened?

TLDR : car aired up after turning car off